Bases, home plates, and pitcher&#39;s rubbers for use on synthetic turf infill material

ABSTRACT

A base, a home plate, and a pitcher&#39;s rubber for use on synthetic turf infill material for playing baseball includes an upper portion in the shape of the at least one of base, home plate, and a pitcher&#39;s rubber, and a lower portion comprising a plurality of downwardly-depending projections extending about ½ inch to about 1 inch below a bottom surface of the upper portion. The plurality of downwardly-depending projections is engageable with the synthetic turf infill material for playing baseball.

CROSS-REFERENCE TO RELATED APPLICATION

This patent application is a continuation of U.S. patent application Ser. No. 12/371,848, filed Feb. 16, 2009, and entitled “Bases, Home Plates, And Pitcher's Rubbers For Use On Synthetic Turf Infill Material,” which issued on Dec. 25, 2012, as U.S. Pat. No. 8,337,340, the entire subject matter of his application being incorporated herein by reference.

FIELD OF THE INVENTION

This invention relates generally to bases, home plates, and pitcher's rubbers, and more particularly to bases, home plates, and pitcher's rubbers for use on synthetic turf for playing baseball and softball.

BACKGROUND OF THE INVENTION

Over the past years, the synthetic turf industry has grown dramatically with the introduction of infill turf. These synthetic turf fields are much more affordable than earlier turfs and are more player friendly as well. In many situations these fields are used for multiple sports and it is important that when baseball or softball are not being played that the bases can be removed allowing other sports to be played.

Until now there were two main categories of bases that could be used in these applications. First, there are in-ground bases that utilize some sort of sleeve anchored into the field sub-base. These bases are often used by higher level programs. They are not versatile in that they can only be used in the location that the anchor is installed, they do not allow the flexibility to use other areas or other fields when scheduling is tight. Second, there are also simple rubber bases that are placed on top of the turf. These bases allow more flexibility, but they move out of place with even the slightest contact.

There is a need for further bases, home plates, and pitcher's rubbers, and more particularly to bases, home plates, and pitcher's rubbers for use on synthetic turf for playing baseball and softball.

SUMMARY OF THE INVENTION

In a first aspect, the present invention provides a device for use as at least one of a base, a home plate, and a pitcher's rubber on a synthetic turf infill material for playing baseball. The device includes an upper portion in the shape of the at least one of base, home plate, and a pitcher's rubber, and a lower portion comprising a plurality of downwardly-depending projections extending about ½ inch to about 1 inch below a bottom surface of the upper portion. The plurality of downwardly-depending projections is engageable with the synthetic turf infill material for playing baseball.

In a second aspect, the present invention provides a method of forming a device for use as at least one of a base, a home plate, and a pitcher's rubber on synthetic turf infill material for playing baseball. The method includes providing an upper portion in the shape of the at least one of base, home plate, and a pitcher's rubber, providing a lower portion comprising a plurality of downwardly-depending projections, the plurality of downwardly-depending projections is engageable with the synthetic turf infill material for playing baseball, and attaching the lower portion to the upper portion so that the downwardly-depending projections extend about ½ inch to about 1 inch below a bottom surface of the upper portion.

In a third aspect, the present invention provides a home plate for use on synthetic turf infill material for playing baseball. The home plate includes an upper portion, and a lower portion comprising a plurality of downwardly-depending projections extending about ½ inch to about 1 inch below a bottom surface of the upper portion. The downwardly-depending projections comprising a density of about 1 projection to about 2 projections per square inch, and the plurality of downwardly-depending projections is engageable with the synthetic turf infill material for playing baseball.

In a fourth aspect, the present invention provides a pitcher's rubber for use on synthetic turf infill material for playing baseball. The pitcher's rubber includes an upper portion, and a lower portion comprising a plurality of downwardly-depending projections extending about ½ inch to about 1 inch below a bottom surface of the upper portion. The downwardly-depending projections comprising a density of about 1 projection to about 2 projections per square inch and the plurality of downwardly-depending projections is engageable with the synthetic turf infill material for playing baseball.

In a fifth aspect, the present invention provides a kit for playing baseball on a synthetic field. The kit may include a plurality of devices as noted above defining a home plate, three bases, and a pitcher's rubber.

In a sixth aspect, the present invention provides a baseball field which includes a synthetic field, and a plurality of devices as noted above defining a home plate, three bases, and a pitcher's rubber.

BRIEF DESCRIPTION OF THE DRAWINGS

The subject matter which is regarded as the invention is particularly pointed out and distinctly claimed in the concluding portion of the specification. The invention, however, may best be understood by reference to the following detailed description of various embodiments and the accompanying drawings in which:

FIG. 1 is a front perspective view of a home plate in accordance with the present invention;

FIG. 2 is a bottom perspective view of the home plate of FIG. 1;

FIG. 3 is a bottom plan view of the home plate of FIG. 1;

FIG. 4 is a rear elevational view of the home plate of FIG. 1;

FIG. 5 is a side elevational view of the home plate of FIG. 1;

FIG. 6 is a front elevational view of the home plate of FIG. 1;

FIG. 7 is a cross-sectional view of the home plate taken along line 7-7 in FIG. 3;

FIG. 8 is a front perspective view of a base such as a first base, a second base, and a third base, in accordance with the present invention;

FIG. 9 is a bottom perspective view of the base of FIG. 8;

FIG. 10 is an enlarged, partial side elevational view of the base of FIG. 8.

FIG. 11 is a rear elevational view of the base of FIG. 8.

FIG. 12 is a side elevational view of the base of FIG. 8;

FIG. 13 is a front elevational view of the base of FIG. 8;

FIG. 14 is a cross-sectional view of the base taken along line 13-13 in FIG. 9;

FIG. 15 is a front perspective view of a pitcher's rubber in accordance with the present invention; and

FIG. 16 is a front elevational view of the pitcher's rubber of FIG. 14.

DETAILED DESCRIPTION OF THE INVENTION

In one embodiment, the present invention is directed generally to a set of devices for playing baseball or softball, which may include a first base, a second base, a third base, a home plate, and a pitcher's rubber. The devices are desirably used on the surface of synthetic turf infill material. The devices have multiple resilient projections on the bottom that engage with and dig into the infill material such as synthetic grass fibers and prevent the device from moving during normal play. The devices such as the bases pop out when a player slides into them in order to minimize injuries.

FIGS. 1-7 illustrate one embodiment of a device 10 such as a home plate in accordance with the present invention for use on synthetic turf infill material 12 which may include an upper portion 20 in the shape of a home plate and a generally circular lower portion 40 having a plurality of resilient downwardly-depending projections 42. The upper portion may have a thickness of about 1 inch.

The resilient downwardly-depending projections may vary in length and extend about ½ inch to about 1 inch in length from a bottom surface 22 of the upper portion, and desirably extend greater than ½ inch below a bottom surface of the upper portion, and are designed to anchor the device onto different types of playing surfaces. The resilient downwardly-depending projections may be generally fustoconically shaped and have an upper diameter of about ¼ inch and a lower distal diameter of about ⅛ inch. The device while desirable for synthetic playing surfaces may also be used on natural grass for a variety of sports. The device is free from traditional anchors in that the devise does not need a permanent sleeve embedded into the field for use. The resilient downwardly-depending projections are designed to hold the base onto the playing surface during normal play but also allow it to move if forced.

For example, the resilient downwardly-depending projections may be disposed in the center and may have a longer length than the length of the projections disposed adjacent to the peripheral edge of the base. In addition, the upper portion 20 may be formed with a plurality of ribs 60 (best shown in FIG. 7) for strengthening the upper portion and may include a recessed cavity 70 (FIG. 7) for receiving a portion of the lower portion having the resilient downwardly-depending projections.

The upper portion and the lower portion may be formed from the same material. For example, the upper portion may be fabricated from a resilient material such as styrene butadiene rubber (SBR), and the lower portion may be fabricated from a resilient material such styrene butadiene rubber (SBR). It will be appreciated that other suitable materials may be employed such as plastic or elastomeric materials. In another embodiment, the upper portion may be formed from a first material and the lower portion may be formed from a second material. The second material may be more resilient than the first material.

The lower portion may be attached to the upper portions using screws and/or adhesive. In another embodiment, the upper portion may be molded in a first mold. Thereafter, the upper portion may be placed in a second mold for molding the lower portion having projections onto the plate portion, e.g., using an overmolding process.

FIGS. 8-14 illustrate another embodiment of the invention for the device in the form of a base 100 such as a first base, a second base, and/or a third base in accordance with the present invention for use in playing baseball or softball on synthetic turf infill material 12. Base 100 is essentially similar to the home plate disclosed above, but with the exception of being configured as a base, e.g., being about 15 inches by about 15 inches, and having a thickness of about 3 inches. The upper portion may be formed from a plastic material, or material as noted above, or other suitable materials such as a cushioning material surrounded by a fabric material.

FIGS. 15 and 16 illustrate another embodiment of the invention of the device in the form of a pitcher's rubber 200 in accordance with the present invention for use in playing baseball or softball on synthetic turf infill material 12. Pitcher's rubber 200 is essentially similar to the home plate and base disclosed above, but with the exception of being configured as a pitcher's rubber, e.g., being about 6 inches by 24 inches, and having a thickness of about 1 inch. The upper portion may be formed from a rubber or rubber-like material such as that as typically used for pitcher's rubbers, or the material noted above, or other suitable materials.

Although the invention has been particularly shown and described with reference to certain preferred embodiments, it will be readily appreciated by those of ordinary skill in the art that various changes and modifications may be made therein, without departing from the spirit and scope of the invention. 

1-30. (canceled)
 31. A base for use on a synthetic turf infill material for playing baseball, said base comprising: an upper portion in the shape at least one of a first base, a second base, or a third base; a lower portion comprising a plurality of downwardly-depending projections extending about ½ inch to about 1 inch below a bottom surface of said upper portion, and a length of said downwardly-depending projections being greater than a width of said downwardly-depending projections; and wherein said plurality of downwardly-depending projections is engageable with the synthetic turf infill material for playing baseball.
 32. The base of claim 31 wherein said plurality of downwardly-depending projections is disposed in a center portion of the bottom surface of the upper portion and spaced away from the edges of the upper portion.
 33. The base of claim 31 wherein said plurality of downwardly-depending projections is spaced a distance of at least about 2 inches from the edges of the upper portion.
 34. The base of claim 31 wherein said plurality of downwardly-depending projections cover about 40 percent of the entire bottom surface of the upper portion.
 35. The base of claim 31 wherein said plurality of downwardly-depending projections comprises an upper width and a lower width, and wherein said upper width being about twice the lower width.
 36. The base of claim 31 wherein said plurality of downwardly-depending projections comprises a flat lower surface.
 37. The base of claim 31 wherein said plurality of downwardly-depending projections is disposed in a center portion of the bottom surface of the upper portion and spaced away from the edges of the upper portion, said plurality of downwardly-depending projections is spaced a distance of at least about 2 inches from the edges of the upper portion, said plurality of downwardly-depending projections cover about 40 percent of the entire bottom surface of the upper portion, and said plurality of downwardly-depending projections comprises an upper width and a lower width, and wherein said upper width being about twice the lower width.
 38. The base of claim 37 wherein said plurality of downwardly-depending projections comprises a flat lower circular surface.
 39. The base of claim 31 wherein said upper portion comprises a plurality of ribs for strengthening said upper portion.
 40. The base of claim 31 wherein at least one of said upper portion and said plurality of downwardly-depending projections comprises a generally resilient material.
 41. The base of claim 31 wherein said plurality of downwardly-depending projections is disposed normal relative to said bottom surface of said upper portion.
 42. The base of claim 31 wherein said downwardly-depending projections comprises an upper diameter of about ¼ inch and a lower distal diameter of about ⅛ inch.
 43. The base of claim 31 wherein said lower portion comprises a density of said downwardly-depending projections of about 1 projection to about 2 projections per square inch.
 44. The base of claim 31 wherein said upper portion comprises a first material, said lower portion comprises a second material, and said second material being more resilient than said first material.
 45. The base of claim 31 wherein said plurality of downwardly-depending projections generally defines a pattern within a circle spaced from a peripheral edge of said upper portion.
 46. The base of claim 31 wherein said plurality of downwardly-depending projections is generally arranged in a plurality of concentric circles.
 47. A home plate for use on a synthetic turf infill material for playing baseball, said home plate comprising: an upper portion in the shape the home plate; a lower portion comprising a plurality of downwardly-depending projections extending about ½ inch to about 1 inch below a bottom surface of said upper portion, and a length of said downwardly-depending projections being greater than a width of said downwardly-depending projections; and wherein said plurality of downwardly-depending projections is engageable with the synthetic turf infill material for playing baseball.
 48. The home plate of claim 47 wherein said plurality of downwardly-depending projections are disposed in a center portion of the bottom surface of the upper portion and spaced away from the edges of the upper portion.
 49. The home plate of claim 47 wherein said plurality of downwardly-depending projections are spaced a distance of at least about 2 inches from the edges of the upper portion.
 50. The home plate of claim 47 wherein said plurality of downwardly-depending projections cover about 35 percent of the entire bottom surface of the upper portion.
 51. The home plate of claim 47 wherein said plurality of downwardly-depending projections comprises an upper width and a lower width, and wherein said upper width being about twice the lower width.
 52. The home plate of claim 47 wherein said plurality of downwardly-depending projections comprises a flat lower surface.
 53. The home plate of claim 47 wherein said plurality of downwardly-depending projections are disposed in a center portion of the bottom surface of the upper portion and spaced away from the edges of the upper portion, said plurality of downwardly-depending projections are spaced a distance of at least about 2 inches from the edges of the upper portion, said plurality of downwardly-depending projections cover about 35 percent of the entire bottom surface of the upper portion, and said plurality of downwardly-depending projections comprises an upper width and a lower width, and wherein said upper width being about twice the lower width.
 54. The home plate of claim 53 wherein said plurality of downwardly-depending projections comprises a flat lower circular surface.
 55. The home plate of claim 47 wherein said upper portion comprises a plurality of ribs for strengthening said upper portion.
 56. The home plate of claim 47 wherein at least one of said upper portion and said plurality of downwardly-depending projections comprises a generally resilient material.
 57. The home plate of claim 47 wherein said plurality of downwardly-depending projections is disposed normal relative to said bottom surface of said upper portion.
 58. The home plate of claim 47 wherein said downwardly-depending projections comprises an upper diameter of about ¼ inch and a lower distal diameter of about ⅛ inch.
 59. The home plate of claim 47 wherein said lower portion comprises a density of said downwardly-depending projections of about 1 projection to about 2 projections per square inch.
 60. The home plate of claim 47 wherein said upper portion comprises a first material, said lower portion comprises a second material, and said second material being more resilient than said first material.
 61. The home plate of claim 47 wherein said plurality of downwardly-depending projections generally defines a pattern within a circle spaced from a peripheral edge of said upper portion.
 62. The home plate of claim 47 wherein said plurality of downwardly-depending projections is generally arranged in a plurality of concentric circles.
 63. A pitcher's rubber for use on a synthetic turf infill material for playing baseball, said pitcher's rubber comprising: an upper portion in the shape the pitcher's rubber; a lower portion comprising a plurality of downwardly-depending projections extending about ½ inch to about 1 inch below a bottom surface of said upper portion, and a length of said downwardly-depending projections being greater than a width of said downwardly-depending projections; and wherein said plurality of downwardly-depending projections is engageable with the synthetic turf infill material for playing baseball.
 64. The pitcher's rubber of claim 63 wherein said plurality of downwardly-depending projections is disposed in a center portion of the bottom surface of the upper portion and spaced away from the edges of the upper portion.
 65. The pitcher's rubber of claim 63 wherein said plurality of downwardly-depending projections are spaced a distance of at least about 2 inches from the edges of the upper portion.
 66. The pitcher's rubber of claim 63 wherein said plurality of downwardly-depending projections comprises an upper width and a lower width, and wherein said upper width being about twice the lower width.
 67. The pitcher's rubber of claim 63 wherein said plurality of downwardly-depending projections comprises a flat lower surface.
 68. The pitcher's rubber of claim 63 wherein said plurality of downwardly-depending projections are disposed in a center portion of the bottom surface of the upper portion and spaced away from the edges of the upper portion, said plurality of downwardly-depending projections are spaced a distance of at least about 2 inches from the edges of the upper portion, and said plurality of downwardly-depending projections comprises an upper width and a lower width, and wherein said upper width being about twice the lower width.
 69. The pitcher's rubber of claim 68 wherein said plurality of downwardly-depending projections comprises a flat lower circular surface.
 70. The pitcher's rubber of claim 63 wherein at least one of said upper portion and said plurality of downwardly-depending projections comprises a generally resilient material.
 71. The pitcher's rubber of claim 63 wherein said plurality of downwardly-depending projections is disposed normal relative to said bottom surface of said upper portion.
 72. The pitcher's rubber of claim 63 wherein said downwardly-depending projections comprises an upper diameter of about ¼ inch and a lower distal diameter of about ⅛ inch.
 73. The pitcher's rubber of claim 63 wherein said upper portion comprises a first material, said lower portion comprises a second material, and said second material being more resilient than said first material. 